Lock installation



Feb. 8, 1966 C. S. PAPAS LOCK INSTALLATION 6 Sheets-Sheet 1 Filed May 4, 1964 INVENTOR, 5727/2976 7%?51 Feb. 3, 1966 Q s, PAPAS 3,233,439

LOCK INSTALLATION Filed May 4, 1964 6 Sheets-Sheet 2 //yj j /jf /i INVENTOR. 50715747756@ 7%?45.

W *-EI Feb. 8, 1966 C, s, PAPAS v 3,233,439

LOCK INSTALLATION Feb 8, 1966 c. s. PAPAs LOCK INSTALLATION 6 Sheets-Sheet 4 Filed May 4, 1964 INVENTOR. -l El. fow'idwlifc L5'. H745.

BY I

/7 Tax/)941 Feb. 8, 1966 c. s. PAPAs LOCK INSTALLATION 6 Sheets-Sheet 5 -Filed May 4, 1964 INVENTOR. @077527471272776 fdf'.

)ma/sf Feb. 8, 1966 C, s, PAPAS 3,233,439

LOCK INSTALLATION jfl Patented Feb. 8, 1966 3,233,439 LOCK INSTALLATION Constantine S. Papas, 16819 Manor, Detroit, Mich. Filed May 4, 1964, Ser. No. 368,750 32 Claims. (Cl. 70-152) This case is a continuation-in-part of my copending United States patent application No. 165,143, ltiled January 9, 1962, now abandoned.

This invention relates to a door ylatching and locking mechanism.

The latching and locking mechanism, hereinafter referred to as .a door lock mechanism, of this invention is one which can 'be locked and unlocked from the inside by means actuated by the inner door knob and can be locked from the outside by key-actuated means. The lock mechanism of this invention was specifically designed to besimple in construction and to 'have a minimum number of parts. Therefore, it is an object of this invention to provide a lock -mechanism of the above described type having only a minimum number of parts.

By virtue of the few parts required, the lock mechanism of this invention can be easily `assembled and disassembled. Therefore, it is another object of this invention to provide a lock mechanism having a construction which facilitates its assembly -and disassembly.

In practice, it is common that door locking mechanisms be provided with different apparatus or be provided with apparatus which must be specially adapted to accommodate doors of different thicknesses. It is an object of this invention to provide a door lock mechanism which is usable with |doors of various thicknesses without the requirement of alteration or adaptation of any of the parts.

In many applications it is required that the door lock mechanism be provided with a panic release whereby the door, if in a locked condition, can be readily unlocked in cases of emergency. Therefore, it is an object of this invention to provide a lock mechanism in which the releasing of the lock occurs in accordance with movement of the inner door knob thereby providing panic release means on the door lock mechanism. Along the same line it is a further object of this invention to provide a door lock mechanism having a si-mple panic release mechanism thereby facilitating the opening of the door from the inside -when it is in a locked condition.

In many applications the door is locked from the inside by a structure which is auxiliary to and independent of the inside door knob. It is `another object of this invention to provide a door lock mechanism which is operable `from the inside and can be locked and unlocked by direct movement of the inside door knob. Along the same line, it is the object of this invention to provide an inside door knob of a shape whereby the locked or unlocked condition of the lock mechanism can be determined simply by visual observation of Ithe door knob.

The lock mechanism of this invention has been designed having all operating parts mounted within the contines of a bolt casing having substantially the same dimension as the outer peripheral contour of the movable bolt. Therefore, it is another object of this invention to provide a bolt mechanism of a compact design requiring a minimum space for installation.

In a mobile home the door latch therein is subjected to loads of a magnitude which many ordinary door locks would not be `capable of withstanding; i.e., particularly when the mobile home is being towed by a vehicle. Thus, it is extremely important that the door latch used in the mobile yhome be rugged and remain secure regardless of the various loads applied thereto. It is an object therefore of this invention to provide a door lock mecha- Y nism particularly capable of withstanding the various loads imposed in a mobile home application. Along the same line, it is another object of this invention to provide means for maintaining the lock mechanism in a locked condition.

Other objects, features, and `adv-antages of the present invention will become apparent from the subsequent description and the appended claims, taken in conjunction with the accompanying drawings, in which:

FIG-URE 1 is a front elevational View showing the door lock mechanism of this invention in relation to -a door shown in phantom;

FIGURE 2 is a sectional View of the door lock mechanism of FIGURE 1 taken substantially along the line 2 3.;

FIGURE 3 is a fragmentary view, with some parts shown in section, of the lock mechanism of FIGURE 2 taken substantially along the line 3 3;

FIGURE 4 is a lfragmentary view, with some parts Shown in section, of the lock mechanism of FIGURE 2 taken substantially along the line 4-4;

FIGURE 5 is a fragmentary View, with some parts shown in section, of the lock mechanism of FIGURE 2 taken substantially along the line 5 5;

FIGURE 6 is a pictorial view of some of the components of the lock mechanism of this invention;

FIGURE 7 is a side elevational view of the lock mechanism of this invention taken substantially along the line '7 7 of FIGURE 2 showing the lock mechanism in a locked condition;

FIGURE 8 is a View similar to that shown in FIG- URE 7 with the lock mechanism shown in an unlocked condition;

FIGURE 9 is a View similar to that of FIGURES 7 and 8 showing the lock mechanism in an unlatched condition;

FIGURE 10 is a sectional view similar to that of FIG- URE 2 showing a modified door lock mechanism in a locked condition;

FIGURE l1 is a sectional vie-w -of the modied door lock mechanism of FIGURE 10 taken substantially along the line l11--11g FIGURE i12 is a sectional view of the modified door lock mechanism of FIGURE 10 taken substantially along the line 12-12;

FIGURE 13 is a sectional view of the modied door lock mechanism of FIGURE 10 taken substantially along the line 1.3-13 with some portions left in elevation;

FIGURE 14 is a sectional View similar to that of FIG- URE 1l with the modied door lock mechanism shown in an unlocked condition through operation of the inside door knob;

FIGURE 15 is a sectional view similar to that shown in FIGURE 14 showing the moditied door lock mechanism in an unlatched condition by operation of the inside door knob;

FIGURE lr6 is a fragmentary sectional view similar to that of FIGURE 11 depicting the modied door lock mechanism being unlocked from the outside by a key;

FIGURE 17 is a fragmentary sectional view similar to that of FIGURE 16 depicting the modied door lock mechanism in an unlatched condition by operation of the outside door knob; and

FIGURE 18 is a pictorial, exploded view of some of the components of the modied lock mechanism of this invention.

Looking now to FIGURES l and 2, the lock mechanism of this invention is generally designated by the numeral 10 and is shown mounted on ya door 12 having inner and outer panels 14 and 16. An elongated bolt member 18 of bifurcated construction is slidably disposed Within a bolt casing assembly 20 which is in turn disposed in 3. the door member 12. The bolt -mem'ber 18 terminates in its outer end in a head portion which is tapered to facilitate closing the door. The bolt casing is comprised of a pair of matable shell members 22 and 24 which are secured to a face plate 26 `which is secured to the front edge 28 of the door 12 by means of a pair of screws 30.

The face plate 26 has an aperture substantially equal to.

that of the lbolt 18 and can be made as a separate piece and Welded to one of the shell members 22, 24 or it can be made integrally therewith. In the preferred embodiment the shell member 24 is cast with an inwardly extending, flat spring stop member 32 having a rod portion 33 extending therefrom which is extensible through an aligned aperture 36 in the opposite shell member 22 and with an inwardly extending rod member 34 which has a reduced diameter portion which is extensible through an aligned aperture 38. in the opposite shell member 22. The two shell members 22 and 24 are then secured together by peening over that portion of the rods 33 and -34 which extend beyond the shell member 22. The bolt casing 20 has substantially the same dimension as the outer peripheral contour of the bolt 18, thus providing7 an assembly requiring only a minimum space for installaion.

The bifurcated bolt member 18 is disposed within the casing 20 with its parallelly extending leg portions 40 and 42 (see FIGURE 6) disposed on either side of the spring stopmember 32. A bolt spring 44 is disposed 1n between the leg portions 40 and `42 and has one end in contact with the spring stop member 32 and its opposite end in contact with the bolt member 18 and thereby resiliently urges the bolt member 18 outwardly from the casing 20 through a rectangular aperture 46 in the face plate .member 26. The bolt 18 is restrained from movin-g completely. out of the bolt casing 20 by means of a pair of inwardly extending projections 62 and 64 on the leg portions and 42, respectively, which, with the bolt 18 in itsoutermost extremity by virtue of the force of the bolt spring 44, are in contact with the spring stop member 32 (FIGURE 7).

The leg portions 40 and 42 of bolt 18 terminate in enlarged sections and 52, respectively. The junction between the legportion 40 and the enlarged section 50 defines a pair of shoulders 54 and 56 disposed on opposite sides of the leg portion 40, while the leg portion 42 and the enlarged portion 52 define oppositely disposed shoulders 58 and 60. The bolt member 18 has a pair of inwardly disposed stop portions 66 and 68 disposed on leg portions 40 and 42, respectively, serving a purpose to be described. In the preferred embodiment the stop portions 66, 68 are defined by surfaces inclined at approximately 30 with-respect to the respective leg portion 40, 42.

The bolt member 18 is moved rearwardly into the casing 20, and hence unlatched, from the inside of the door 12 by means of an'inner knob assembly 70 and from the outside by means of an outer door knob assembly 72. The inner door knob assembly 70 has a door knob member 74 having an elliptically shaped portion and having a generally tubular portion 76 disposed partially interiorly of the elliptical portion and extending outwardly therefrom. The tubular portion 76 terminates in a reduced diameter portion 78 and has at its outermost enda hexagonally shaped aperture 80.

The inner knob 74 has its reduced diameter portion 78 rotatably disposed within a bore 82 extending through and substantially centrally disposed in an inner escutcheon plate member 84. The knob 74 is axially secured t0 the inner escutcheon member 84 by means of the shoulder defined by the inner extremity of the reduced diameter portion 78 and by a snap ring 86 disposed in an annular groove in the reduced diameter portion '78. An elongated inner control sleeve member 90 is slidably disposed within the tubular portion 76 and has a shank portion 92 with av hexagonally shaped outer surface extending through the hexagonally shaped opening 80. The shank terminates at its inner end in an enlarged, generally annular flange portion 94 which is slidable within the tubular portion 76 of the knob 74. An inner biasing spring 96 is disposed within the tubular portion 76 and has one end in abutment with the annular flange 94 and has its opposite end in abutment with an inner knob cover 98 secured to the open end of the elliptical portion of the knob 74. The inner biasing spring member 96 is preloaded to urge the shank portion 92 outwardly through the aperture 80.

The shank 92 of the inner control sleeve or shaft 90 is matably disposed within a hexagonally shaped recess 100 located in a boss 102 in a combination cam member 104 (FIGURES 2 and 6). The combination cam member 104 is located within the bolt casing 20 with the boss portion 102 journaled within an outwardly extending tlangeor bearing boss portion 105 in the casing 20. Adjacent the boss 102 is a Iirst cam member or segment 106 having an arcuately shaped outer portion 107 which terminates at either end in oppositely extending ears or lugs 110k and 112. WithV the bolt 18 vin its outermost position, i.e., with the projections 62 and 64 against stop portion 32, the lugs 110 and 112' are radially disposed from the shoulders 54 and S8 on the bolt member 18. Upon rotation of the combination cam member 104 in either a clockwise or counterclockwise direction, the lug 110 or 112 will engage the corresponding shoulf der 54 or 58, thus moving the bolt 18 rearwardly into the bolt casing 20, allowing the door 12 to be opened For a purpose to be seen, the first cam member' 106 is' designed such that the lugs 110 and 112 do not contact the corresponding shoulders 54 and 58 until that cam member has been rotated approximately 35 from its center position (FIGURE 8). Since the inner control sleeve member 90 is keyed to the knob 74 as Well as to the combination cam member 104, rotation of the knob 74 will cause corresponding rotation of the combination cam member 104, thus causing translational unlatching movement of the bolt member 18. Adjacent to and integral with the irst cam member 106 yof the combination cam 104 is an elliptical locking cam 108 which serves a purpose to be described. The locking cam 108 need not be truly elliptical and in the preferred embodiment is of a circular cross-section with diametrically oppositely disposed, radially outwardly extending peaked portions. For purposes of discussion, the major axis of cam 108 is taken as the distance between peaked portions while the minor axis issubstantially the diameter of the circular cross-section.

Thus far the construction and actuation of the inner' door knob assembly 70 has been described and explained. The outer door knob assembly 72 is of a similar construction and causes latching action in a similar manner as that described in conjunction with the inner door knob assembly 70. The outer knob assembly 72 has an outer door knob 114 having an outer shape matching that of the inner door knob 74 and 'has a generally tubular portion 116 which extends partially interiorly within and partially exteriorly from the inner door knob 114. The tubular portion terminates at its outermost extremity in a reduced diameter portion 118 which is rotatably disposed within a bore 120 in an outer escutcheon plate member 112. The outer knob 114 is axially secured within the outer escutcheon member 122 by Ameans of a snap ring 124 disposed within a radial slot in the outer surface of the reduced diameter portion 118..

An outer control sleeve or shaft 126 is slidably disposed within the bore of the tubular portion 1116 and is similar in construction to the inner control sleeve 90: and thus has a shank 127 having an outer surface of a, hexagonal shape and an annular ange 128 which is slidably disposed within the bore of the tubular portion 116. The tubular portion 116 terminates at its inner.

most end `in a hexagonally' shaped aperturev 130 throughl which the shank 127 is urged by means of a bias spring 132 in a manner to be described. As thus biased axially outwardly, the shank 127 is urged into engagement with a hexagonally shaped aperture 134 located in a boss 136 on a cam member 138. The cam member 138 is journaled within an annular ilange or bearing boss 140 formed in the shell member 24 of the bolt casing 20. The cam member 138 is similar in shape to that portion of the combination cam 104 including thet boss 102 and the rst cam member 106 and thus has a pair of oppositely disposed ears or lugs 143 and 145 which are in turn engagable with the shoulders 56 and 60, respectively, of the bolt member 18. Thus, as the knob 1.14 is rotated, it rotates with it the outer control sleeve member 126 which in turn rotates the cam member 138. As in the case of the combination cam member 104, the cam member 138 is rotated approximately 35 before the lugs 143 and 145 engage the shoulders 56 and 60 of the bolt 18. Upon rotation of the outer knob member 114, the bolt 18 can be caused to retract via the engagement of the ear or lug 143 or 145 with the corresponding shoulder 56 or 60 on bolt member 18. Thus the latching action of the bolt member 18 can be caused to occur by either the inner knob member 74 or the outer knob member 114 independently of each other. The next point to be discussed is the locking action.

Rotatably disposed upon the pin 34 are a pair of similarly constructed lock lever members 142 and 144 (FIG- URE 6); since both of the members are identically constructed, description of only one of the members need be given. The lock lever 142 has a boss portion 146 having a bore extending therethrough whereby the lock lever 142 can be rotatably mounted upon the pin 34. A dog leg shaped portion 148 extends outwardly from the outer surface of the boss 146 and extends slightly axially beyond one end thereof such that when the two lock lever members 142 and 144 are placed upon the pin 34, the corresponding dog leg portions are in a confronting relationship and are pivotable towards and away from each other about the pin 34 (FIGURE 4.) The lever member 142 has at the extremity of dog leg portion 148 an inclined surface 150 which is matable with the inclined surface 66 for a purpose to be seen; likewise lever member 144 has a similarly inclined surface matable with inclined surface 68.

The elliptical lock cam member 108 is disposed in between the confronting dog leg portions of the lever members 142 and 144. The cam member 108 has an outer surface of a shape similar to that of an ellipse such that when its major axis is rotated into a vertical position (as shown in FIGURE 4), the lock lever members 142 and 144 are moved outwardly while, when the elliptical lock cam member 108 is rotated away from that vertical position, the lock lever members 142 and 144 are free to move inwardly towards each other. Since the locking cam member 108 is an integral part of the combination cam 104, rotation of the knob 74 causes a corresponding rotation of the locking cam 108.

Looking now to FIGURE 4 it can be seen that upon rotation of the inner door knob member 74 to place the major axis o f the elliptical locking cam 108 in the vertical position, the dog leg portions of the lever members 142 and 144 are moved outwardly from each other into a position such that any rearward movement of the bolt member 18 is prevented by virtue of the engagement between the inclined surfaces 66 and 68 and the surface 150 of the lock lever member 142 and corresponding surface of lever 144. Any effort in the rearward movement of the bolt member 18 in an attempt to open the door 12 causes a force to be placed upon the lock lever members 142 and 144 and upon the locking cam 108. Thus it can be seen that with the locking cam member 108 in the position as shown in FIGURE 4, the bolt 18 cannot be moved to an unlatched position via the outer door knob member 114. However, since the locking cam 108 is integral with the combination cam 104, rotation of the inner knob member 74 simultaneously will rotate the locking cam member 108 as well as the rst latching cam member 106 such that when -the latching cam 106 is in contact with either of the shoulders 54 and 58, the locking cam member 108 has its minor axis in the vertical plane, thus allowing the lock lever members 142 and 144 lto be moved inwardly toward each other and hence out of the path of travel of the bolt member 18. The amount of rotation required to place the elliptical lock cam 108 in a position whereby the lock levers 142, 144 do not block movement of the bolt 18 is approximately 35. Thus when lug 110 or 112 is ready to engage shoulder 54 or 58 the lock cam 108 is out of its lock position. Note that by inclining the surfaces 66 and 68, rearward movement of the bolt member 18 provides an inward component of force acting upon both the lock lever members 142 and 144 such that upon retraction of bolt member 18 with the cam member 108 having its minor axis in the vertical plane, the lock lever members 142 and 144 are moved inwardly towards each other and out of the path of the bolt 18 responsively to the rearward movement of the bolt member 18. From the above discussion it can be seen, then, that the door 12 can be locked and unlocked via the inner door knob member 74.

In order to provide means positively indicating and retaining the door knob member 74 in the locked position a fiat spring member is mounted to the inner side of the inner escutcheon plate member 84 via a pair of cast pins 162 which pass through a pair of corresponding apertures in the flat spring member 160. The ilat spring member 160 is then secured to the inner escutcheon member84 by peening the ends of the pins 162 over (see FIG- URE 5.) The spring lock means 160 is provided with a pair of projections 166. The end of the reduced diameter portion 78 of the inner door knob member 74 is provided with a diametrically extending slot 168 which is of a depth to receive the pair of projections 166. The intersection of the projections 166 and the slot 168 is provided to be coincident with the positioning of the locking cam member 108 in its locking position. In locking thev door 12, the inner door knob member 74 is rotated intothe locking position at which time a positive snapin action occurs which is noticeable to the user, thus providing a positive indication by feel that the door 12 has been locked. In order to provide a visual indication that the door 12 is locked, the inner knob member 74 is provided of an elliptical shape such that when the locking cam member 108 is in locking position, the major axis of the ellipse of inner door knob member 74 is aligned vertically as shown in FIGURES l and 7. Thus, it is apparent to the user both visually and by feel when the door 12 is locked by the lock mechanism 10. The engagement of the projections 166 with the slot 168 provides an additional function in that it assures that the lock mechanism 10 cannot become unlocked through vibrational or other types of forces.

The effort required to rotate the inner knob member 74 from its unlocked position against the locking action of spring lock means 160 in slot 168 is slight, such that in cases of emergency the lock mechanism 10 can be easily unlocked and unlatched from the inside. Thus the door lock mechanism 10 provides a panic release mechanism whereby under emergency circumstances the door lock mechanism 10 can be easily unlocked and unlatched from the inside and the door 12 opened.

The previously described locking and latching action of the lock mechanism 10 can best be seen in FIGURES 7, 8 and 9. In FIGURE 7 the inner door knob member 74, shown in phantom, is shown with its elliptically shaped knob having its major axis in the vertical position, indicating a locked condition. At the same time, the locking cam 108 has its major axis in the vertical position forcing the locking lever members 142, 144 outwardly into a blocking relationship with the inclined portions 66,

68 of the bolt 18. Thus, as shown in lFIGrURl-.r 7, the

lock mechanism is in a locked condition. In FIG- URE 8 the inner door knob member 74 has been rotated approximately thus moving the major axisl of the locking cam 108 out of the vertical position, allowing the locking lever members 142, 144 to be moved inwardly,

thus allowing the lock mechanism 10 to be unlatched. Thus FlGURE 8 shows lock mechanism 10 in an unlocked condition. In FIGURE 9 the inner door knob member 74 has been rotated beyond 35, thus moving i the lug 110 into engagement with shoulder S4 of bolt 18 and moving the boit 18 rearwardly into an unlatched condition. FIGURE 9, then, shows the lock mechanism 10 in an unlatched condition.

Thus far it has been shown how the door lock mechfanism 10 can be unlatched from the outside or inside land how the door lock mechanism 10 can be locked from 'the inside such that it cannot -be unlatched from the outside. The door lock mechanism 10 is provided with a key-actuated mechanism whereby the mechanism 10 can be unlocked from the outside. Thus, looking now to FGURE 2, the outer door knob member 114 has a lock cylinder member disposed within a conforming lock cylinder cavity 172 provided in the interiorly disposed section of the tubular portion `116. The lock cylinder 170 is retained within the cylinder cavity 172 by means of a snap ring 174. Since the construction of the lock cylinder 170 does not constitute a part of this invention and since the construction of such elements are well known in the art, no detailed description thereof need be given. The lock cylinder member 170 has an actuator pin 176 which is eccentricallydisposed and can be rotated via the proper key in the lock cylinder member 170. As previously mentioned, the outer control sleeve 126 is disposed within the tubular portion 116 of the outer knob member 114 and has its shank portion 1217 urged outwardly therefrom via the contact with one end of the spring member 132. The other end of the spring member 132 is in contact with an annular tlange 17S of a lock actuator pin member 180l which has an elongated pin portion 182 having a generally circular cross section with a hat portion thereon to provide a keying or locking action for a purpose to'be described. The elongated pin 182 is free to pass through the hollow outer control sleeve member 126 through the cam member 138 and into locking engagement with a similarly shaped aperture in the locking cam member 108 (see FIGURES 3`and 4) and into the hollow inner control sleeve member 90. Thus, with the actuator pin 180 keyed to the locking cam 108, rotation of the actuator pin 100 will cause a corresponding rotation of the locking cam member 108. In the same light, the outer actuating shaft or control sleeve-member 125 can be rotated without rotating the actuator pin 180. Adjacent to the ange 178 is a generally V-shaped cam portion 186 which is disposed eccentrically with respect to the rotational axis ot the lock actuator pin member 180. As the lock cylinder or actuator pin 176 is rotated by means of the key in the lock cylinder member 170, it is moved into contact with one or the other of the flats of the V-shaped cam 186, depending upon the direction of rotation, thereby causing the actuator pin member 180 to be rotated, thus causing the locking cam member 108 to be rotated. Of course, rotation of locking cam member 10S causes a corresponding rotation of the inner door vknob member '74 which cau-ses the lock mechanism 10 to be placed in either a locked or an unlocked condition.

Note that the inner control sleeve memberv 90 and the outer control sleeve member 126` are both urged outwardly by spring action from the corresponding door knob member 74 and 114. Also, the lock actuator pin member 180, in order to accommodate doors of various thicknesses, can be moved further into or out of the inner control sleeve member 90. Thus the door mechanism assembly 10, as described vand shown in the iigsleeve 202,203 which extends therefrom at right angles and isreceivable within a lock 'mounting bore 204, 205 in inner and outer door panels 14, 16, respectively. A peripheral flange 206, 207 extends inwardly from the iiat plate portion 200,' 201 a 'distance less than the inward extension or" the cylindrical sleeve 202, 203 such that when the sleeve 202, 203 is piloted Within the lock mounting bore l204i, 205, the peripheral flange 206, 207 is in frictional contact with the door panel 14,A 16, respectively.

The outer escutcheon member 122 is provided Vwith a pair of internally threaded generally tubular extension portions while the inner escutcheon plate member 84 is provided with a pair of apertures 192. One of the tubular extending portions 190 extends through aligned openings in both the shell-members l22 and 24 of bolt casing 20 While theother of the tubularfextending members `190 is disposed Within al semicircularly shaped notch 193 at the inward extremity of the bolt casing 20 (FIGURES 2 and 7). Thus the bolt casing 20l is maintained within the door 12 by meansof the face plate 26 and by means of the engagement of the tubular extending members 190. The inner escutcheon plate 84 and the door knob assembly 70 secured thereto are attached to the outer escutcheon plate member 122 'and its corresponding outer door knob assembly 'i2 via a pair of bolts 195 `which pass through the apertures 192 and are threadably engageable within the threaded tubular extension members 190. By threading the bolts 196 within the members 190, the distance between escutcheon members 84 and 122 can be'varied to accommodate doors of diferent thicknesses, and thebolts 1916 can be threaded from the inside of the door 12 until the peripheraly flanges 206, 207 are in frictional contact with door panels 14 and 16, respectively.

A modified form of the invention is shown in FGURES 10-18; in the following description components' of the modified door lock mechanism similar to like components in the embodiment shown in FIGURES l-9 and performing similar functions, are given the same numerical designation with the additionfof a lletter subscript. n

Looking now to FIGURE l0, the modified door lock mechanism of this invention is generally designated by the numeral 10a and includes an elongated bolt assembly 18a, which is of a two-piece construction-and includes a longitudinally extending, bifurcated segment 250 which is matably disposed within a bolt casing assembly 20a and which has slotted'ly secured attits transversely slotted forward end portion 249 a head segment 252 which is tapered to facilitate the closing of that door to which the improved lock mechanism 10a is mounted.

The forward portion 249 of the biiurcated segment 250 is necked down relative to the rearward bifurcated portion 251. A bolt casing 20a is comprised of a pair of shell members 22a and 24a (FIGURE 18) which can -be ixed to a face plate 26a which in turn can be secured to the front edge of a door by means of a pair of screws. Face plate 26a has an aperture substantially equal in section to that of the head segment 252 and can be made as a separate piece and welded to the shell members 22a, 24a. The shell members 22a and 24a are similarly -formed and together define a necked down portion which matably receives the forward portion 249 of segment 250 and further detine an enlarged rearward portion which matably receives the`bifurcated portion 251 of the segment 250. The shell members 22a and 24a have inner, laterally spaced shoulders 254 defined by the junc- 9 ture of their necked down and rearward portions which are engageable with shoulders 256 defined by the juncture between the necked down portion 249 and enlarged bifurcated portion 251 ofthe ybifurcated segment 250 and hence serve to limit the forwardmost motion of the bolt assembly 1811. The bifurcated portion 251 of segment 250 of the bolt assembly 18a is shorter in length than the enlarged rearward portion of casing 2011 and is matably disposed within the casing 2011 with its parallelly extending, laterally spaced leg portions 4011 and 4211 disposed substantially against opposite lateral extremities of the shell members 22a and 2411 whereby the segment 250 is longitudinally slidable within and its movement guided by the casing 2011.

The leg portions 4011 and 4211 of bolt segment 250 terminate at their rearward ends in enlarger sections 5011 and 52a having depressions 263 and 264, respectively, in their faces which are in confrontation with each other. The Wtdth of the enlarged sections 5011 and 5211 and of the forward portion 249 is greater than that of the remainder of the leg portions 4011 and 4211 and is substantially equal to that of the casing 2011. Thus clearance is provided transversely between the casing 2011 and the opposite sides of the remainder of leg portions 4011 and 4211, for a purpose to be seen. The enlarged sections 5011 and 5211 defined soulders 5411 and 5811, respectively, on the side adjacent the shell member 2211 and shoulders 5611 and 6011, respectively, on the side adjacent the shell member 2411. A pair of springs 258 and 260 are located within the outer shell member 2211, each with one end against a rearward end wall portion 261 of shell member 2211 and with its opposite end in engagement with one of the enlarged sections 5011 and 5211, respectively, of the leg portions 4011 and 42a of the bifucrated member 250 of the bolt assembly 1811. Recesses are formed in the end portions of the leg portions 4011 and 4211 and also in the wall portion 261 which receive the respective ends of springs 258 and 260 to thereby hold the springs from lateral and transverse movement. The springs 258 and 260 are assembled yunder a compressive preload and urge the bolt assembley 1811 to its outermost position at which the shoulders of the enlarged portion of the bifurcated segment 250 engage the shoulders 254 and 256 of the shell members 2211 and 2411, respectively.

The bolt assembly 1811 can be moved rearwardly into the casing 2011, and hence unlatched from the inside of the door by means of an inner knob assembly 7011 and from the outside by means of an outer door knob assembly 72a. The inner and outer knob assemblies 7011 and 7211, respectively, are only partially shown and Vare substantially identical in construction with their similarly numbered counterparts in the embodiment shown and described in FIGURES 1 through 9; hence the specific details of construction of these assemblies will not be described, it being understood that the similarly numbered components with the addition of the subscript 11 are substantially identical to their similarly numbered counterparts as shown and described in FIGURES 1 through 9.

The shank 9211 of the inner control sleeve or shaft 9011 is matably disposed within a hexagonally shaped recess 10011 located in a boss 10211 of a combination cam member 10411 (see FIGURES and 18). The combination cam member 10411 is located within the bolt casing 2011 with the boss portion 10211 journaled within an outwardly extending flange or bearing boss portion 10511 in the outer shell member 2211. Adjacent the boss 10211 and intergal therewith is a iirst cam member or segment 10611 having an arcuately shaped forward portion 10711 which has oppositely, laterally spaced ears or lugs 11011 and 11211. The cam segment 10611 is located proximate the inner surface of the side wall of the shell member 2211 and is movable into the space between that side wall and the remainder of the leg portions 4011 and 4211. By rotation of the combination cam member 10411 in either a clockwise or counter-clockwise direction, the lug 11011 or 11211 will engage a corresponding shoulder 5411 or 5811, thus moving the bolt assembly 1311 rearwardly into the bolt casing 2011 whereby the door lock mechanism 1011 is unlatched. The sequence whereby the `mechanism 1011 is moved from a latched to an unlatched condition via rotation of cam member 10411 is illustrated in FIGURES 11, 14, and 15. For a purpose to be seen, the rst cam member 10611 is designed such that the lugs 11011 and 11211 do not contact the corresponding one of the shoulders 5411 and 5811 until that cam member 1.0611 has been rotated approximately 35 from its center position (FIGURE 14). Since the inner control sleeve member 9011 is keyed to the inner door knob 7411 as well as to the combination cam member 10411, the rotation of the knob member 7411 will cause corresponding rotation of the combination cam member 10411, thus causing translational unlatching movement of the bolt assembly 1811.

Considering now the outer door knob assembly 7211, the shank 12711 is resliently urged axially into engagement with a hexagonaily shaped aperture 13411 located in a boss 13611 on a cam member 13811. The cam member 13811 is journaled in an annular iiange or bearing boss14011 formed in the shell member 2411 of the bolt casing 2011. The cam member 13811 is similar in shape to that portion of the combination cam 10411 including the boss 10211 and the first cam member 10611 and thus has a pair of oppositely disposed ears or lugs 14311 and 14511 which are movable in the transverse space between the remainder of the leg portions 4011 and 4211 and the side wall of the shell member 2411 and which are in turn engageable with the shoulders 5611 and 6011 respectively of the enlarged sections 5011 and 5211, respectively. The outer door knob 11411 is connected to the control sleeve member 12611 Thus as the outer door knob 11411 is rotated it rotates the outer control sleeve member 12611 which in turn rotates the cam member 13811 causing the bolt assembly 1811 to be retracted whereby the door lock mechanism is unlatched. The sequence whereby the mechanism 1011 is moved from a latched to an unlatched condition via rotation of cam member 138 is shown in FIGURES 16 and 17. The ears or lugs 14311 and 14511 of cam member 13811 extend outwardly to a greater extent than the lugs 11011 and 11211 of the first cam member 10611 and hence are located in a position to almost immediately contact the shoulders 5611 and 6011 of the bolt assembly 1811 (see FIGURE 16). Thus the latching action of the bolt assembly 1811 can be eiectuated either by the inner knob member 7411 or the outer knob member 11411 independently of each other. Thus far the latching action of the door lock mechanism 1011 has been described. The mechanism 1011 can be locked by means to be presently described. Adjacent to and integral with the irst cam member 10611 of the combination cam 10411 is an elliptical locking cam 10811. The locking cam 10811 need not be truly elliptical and in the preferred embodiment is of a circular cross section with diametrically oppositely disposed, radially outwardly extending peak portions. For purposes of discussion, the major axis of cam 10811 is taken as the distance between peak portions with the minor axis being substantially the diameter of the circular cross section.

The inner shell 2211 has a shelf 268 proximate the rear wall portion 261 which shelf 268 has formed therein a pair of openings 270 and 272 which are laterally spaced from each other and which, with casing 20a assembled, are in coaxial alignment with a pair of similarly laterall spaced apertures 274 and 276, respectively, formed in a shelf 278 proximate the rear wall portion 280 of the shell member 2411. The shelf 27S is transversely spaced from the shelf 268 to provide clearance for movement of a pair of identically constructed lock lever members 14211 and 14411 which are journaled within the bores 270, 274 and 272, 276, respectively. Thelock lever 14211 has a cylindrical portion 282 which is journaled within the coaxially aligned apertures 270 and 27d for pivotal movement and has an elongated arm portion 284 located centrally of and intermediate the ends of the cylindrical portion 232 and extending radially outwardly from and terminating in a cam portion 28o which is located in con- `frontation with the depression 262 in the enlarged section 5061. The lock lever member 141-111 is similarly constructed and comprises a cylindrical portion 288 vwhich is journaled within the bores 272 and 274 and which has an elongated arm portion 290 extending radially outwardly vtherefrom and terminating in a cam portion 292 which is located in confrontation with the depression 264 in the enlarged section 5211. T he arm portions 284 and 290 extend forwardly on opposite sides of the cam portion 10861 such that when the major axis of the cam member 10811 is rotated into a vertical position as shown in FGURE ll, the lock lever members 14261 and 14411 are lpivoted outwardly while, when the elliptical lock cam member 10811 lis rotated away from the vertical position, the lock lever members 14261 and 14461 are free to pivot inwardly out of the depressions 262 and 264, respectively, and hence out of locking engagement. Since the locking cam member 10811 is an integral part of the combination cam 10411, rotation of the inside door knob '7411 causes a corresponding rotation of the locking cam 10861.

Looking now to FlGURE ll it can be seen that on rotation of the inner door knob member 7411 to place the major axis of the elliptical locking cam 10811 in the vertical position, the locking lever members 14211 and 144a are pivoted outwardly from each other into a position whereby the cam surfaces 286 and 292 engage the depressions 262 and 264i, respectively, such that rearward movement of the bolt assembly 1861 is prevented. Thus with the locking cam member 10211 in the position shown in FIG- URE 1l, the bolt assembly 1811 Cannot be moved to an unlatched position via the outer door knob member 11411. However, since the locking cam 10811 is integral with the combination cam104t11 rotation of the inner knob member 7461 simultaneously will rotate locking cam member 10811 as well as the first latching cam member 10611 such that-when 4the latching cam 10661 is in contact with either of the shoulders S411 and 5811, the locking cam member 10811 has its minor axis in a vertical plane, thus allowing the locking members 14211 and 111411 to be moved inwardly toward each other and hence out of the path of travel of the bolt assembly 1861. The amount of rotation required to place the elliptical lock cam 10861 in a position whereby the lock levers 14261, 14461 do not block movement of the bolt 1&1 is approximately 35. Thus when one of the lugs 11061 and 11211 is ready to engage the respective one of the shoulders 5411 and 5811, the lock cam 10361 is out of its lock position. From the above discussion it can be seen then that a door can be locked and unlocked via the inner door knob member 7461.

In order to provide means positively indicating and retaining the door knob member 7461 in a locked position, locking means as shown in FlGURE 13 are provided in the inner shell 2261. The inner shell 2211 has its boss portion 10561 elongated on diametrically opposite sides and has dened therein oppositely disposed, normally vertically aligned, slots 294 and 296 into which are assembled ball detent assemblies 298 and 300, respectively. The ball detent assemblies comprisev a spherical ball which is resiliently lurged inwardly toward the boss 10561 -by means of a normally compressed coil spring. The boss 10261 of the combination cam 10461 is formed with a pair of diametrically oppositely disposed depressions 302 and 304 which when vertically aligned, receive the balls from the ball detent assemblies 298, 300 respectively and hence retain the door knob member 7461 in the locked position. Only a small force is required on the door knob member 7461 to overcome this locking force of the ball detect assemblies 298 and 300 and hence to rotate the door knob '71161 to actuate the door lock mecharistn 1011. The shell members 2211 and 2411 are preferably made of die cast zinc. In order to retain the ball detent assemblies 298, 300 within their respective slots 294, 296 stamped steel covers 297 and 299 are provided. Each ofthe steel covers 297, 299 is arched slightly and is provided with rows of teeth on opposite sides. The covers 297, 299 are then pressed into their respective slots with the teeth readily gripping the softer zinc shell member 2211.

The door lock mechanism 1011 can be kei actuated and hence unlocked from the outside. The elongated pin portion 18211 of the pin 18011 is of generally circular cross section with ilat portions thereon to provide a keying or locking action and is in locking engagement with a similarly shaped aperture in the locking cam member 10861. A locking arm member 306 has a cylindrical portion 308 which is journaled for pivotal movement in coaxially aligned bores in the locking cam member 10811 and in the latching cam member 13361. The locking arm member 3106 has an elongated arm portion 310 which is located intermediate the ends of the cylindrical portion 308 and which extends outwardly therefrom and terminates in a transversely extending tab 312. The tab 312 is turned to extend in the direction-toward the combination cam 10461 and is normally located and free to pivot within a cutaway portion 313 located at the end of the cam portion 10611 oppositethe cam surface portion .10761. The cutaway portion 313 defines `a vpair of shoulders 3114 and 316 with which the tab-312 isfenegageable for a purpose to be presently seen. Note that the shoulders 314 and 316 are not located symmetrically relative to a horizontal line normal to the axis of rotation of the locking arm member `306. Looking to FIGURE 11 it can be seen that with the combination cam member 10461 in the locked position the locking lever arm14461 will overlay the shoulder316 and hence will substantially block movement of the cam member 10411 by engagement of the tab 312 with shoulder 316; thus in the locked position the tab 312 can move the combination cam member 10411 only by engagement with the shoulder 314. Conversely, with the combina-tion cam member 10411 .in the unlocked position (FIGURE 14) theA locking lever arm 14411 will overlay the shoulder 316 and hence will substantially block movement of the cam member 10411 by engagement of the tab 312 with the shoulder 31o; thus in the locked position, the tab 312 can move the combination cam member 10411 only by engagement with the shoulder 316.

The actuator pin 18011 is keyed to and extends matably through a similarly shaped bore in the cylindrical portion Y 30S of the locking cam member 30o-whereby rotation of the actuator pin 18061 will cause a corresponding rotation of the locking arm member 306 (FIGURES l1, l2). However, the pin portion 18211 of the actuating pin 18011 extends through the outer control sleeve member 12611 in clearance relationship and hence the outer control sleeve member 12611 can be rotated without rotating the actuator pin 18061. The actuator pin 13061 can be operatively connected to a lock cylinder similar to lock cylinder and can be similarly mounted in the outer door knob 11411 whereby the actuator pin member L30@ can be rotated by manipulation of a key in the lock cylinder. This rotation of pin member 18011 causes the locking arm member 306 to-be rotated. In a locked condition (FIG- URE 1l), the locking arm member 306 can be rotated in a counterclockwise direction with the tab 312 engaging the shoulder 314 and the combination Cam member 10411 moved to an unlocked condition (see FGURE 16). The shoulder 314 is located such that with the combination cam member 10411 in the locked condition the cam member 10411 can be moved a sucient distance to unlock the mechanism before the tab 312 engages the locking lever arm 14211 andfurther counterclockwise movement of the locking arm member 306 is blocked. The above described structure allows lthe combination cam member 104@ to be rotated from the unlocked position (FIGURE 16 to the locked position (FIGURE 11) by rotation of the locking arm member 306 in a clockwise direction only to the point where the cam member 164:1 is in the locking position with any further rotation being prevented by engagement of the tab 312 with the locking lever arm 144e Thus a mechanical block is provided whereby it can be positively ascertained when the mechanism a has been locked by key actuation from the outside making it literally impossible to mistakenly place the mechanism 12a in some intermediate locked position. Thus the lock mechanism lta can be selectively placed in either a locked or unlocked condition by key actuation.

Outer and inner escutcheon members, partially shown only, similar to members 122 and 84, can be used with the modified door lock mechanism 10a with one of the vescutcheon members having a pair of longitudinally spaced internally threaded tubular members 190e, with one extending through aligned openings in shell members 22a and 24a and the other nested within a semicircular notch 193a at the inward extremity of the casing 20a. The tubular members 190a are threadably engaged by a pair of bolts 196e which engage the other escutcheon member whereby tightening of bolts 195:1 pulls the escutcheon members against the respective surface of the door to which mechanism 10a is attached. The bolt casing 20a then is maintained within the door by means of the face plate 26a and by means of the engagement of the tubular extending members 190a.

Thus it can be seen that the door lock assembly 10, 19a of this invention can be locked from either the inside or the outside, that the door lock mechanism 10, 10a can be unlatched from the outside by means of the outer knob but can be locked or unlocked from the outside only by key-actuation. The door lock mechanism 10, lta can be place-d in a locked condition by virtue of the inner door knob member alone and can be unlocked or unlatched by virtue of the inner door knob member alone. It can also be seen that the door lock mechanism 10, 10a is comprised of a minimum number of parts to accomplish the desired purposes above described. The lock mechanism, 10, 10a has lock spring means to positively maintain the door in a locked condition and to insure that the lock mechanism 10, 10a will not become unlocked or unlatched due to virbrational or other type loads. Since the door lock mechanism 10, 10a can be unlocked and unlatched from the inside simply by rotation of a single member, i.e., the inner door knob member 74, 74a, with a minimum amount of effort, a panic release mechanism is provided for emergency purposes.

While it will be apparent that the preferred embodiments of the invention disclosed are well calculated to fulfill the objects above stated, it will be appreciated that the invention is susceptible to modification, variation and change without departing from the proper scope or fair meaning of the subjoined claims.

What is claimed is:

1. A door lock mechanism comprising an inner door knob assembly, an outer door knob assembly, a bolt member movable between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having locking cam means for moving and maintaining said locking lever arm means in said blocking position responsively to movement of said combination cam member to a first position and having cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said irst position, said inner door knob assembly having an inner door knob member and means operatively associated with said combination cam member and said inner door knob member for moving said combination cam member responsively'to rotation of said inner door knob member, an

outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on vmovement of said outer cam member, said outer door knob assembly having an outer door knob member and means operatively associated with said outer cam member and said outer door knob member for moving said outer cam member responsively to rotation of said outer door knob member.

2. The apparatus of claim 1 further including spring lock means for resiliently engaging a surface of said inner door knoo member and co-operating with means on said surface with said inner door knob member in said i'irst position for resiliently holding said inner door knob member in that position locating said combination cam member in said rst position.

3. The apparatus of claim 1 with said means operatively associated with said combination cam member and said inner door knob member including an inner actuating shaft slidably disposed Within a portion of said inner door knob member and keyed to said inner door knob member for rotation therewith, said inner actuating shaft being receivable into keyed engagement with said combination cam member, a spring member disposed in said portion of said inner door knob member and urging said inner actuating shaft outwardly into said keyed engagement with said combination cam member, said means operatively associated with said outer cam member and said outer door knob member including an outer actuating shaft slidably disposed within a portion of said outer door knob member and keyed to said outer door knob member for rotation therewith, said outer actuating shaft being receivable into keyed engagement with said outer cam member, a springmember disposed in said portion of said outer door knob member and urging said outer actuating shaft outwardly into said keyed engagement with said outer cam member.

4. The apparatus of claim 3 in which said outer door knob assembly includes key actuated lock means disposed in said outer door knob member, a lock actuator pin member disposed in said portion of said outer door knob member and extending outwardly therefrom into keyed engagement with said combination cam member for moving said combination cam member into and out of said first position responsively to actuation of said key actuated lock means.

5. The apparatus of claim 4 in which said inner and outer `actuating shafts are of a tubular construction and in which said lock actuator pin has an elongated pin portion which -is extensible through said inner and outer actuating shafts in clearance relationship whereby said outer actuating shaft can be rotated without causing rotation of said lock actuator pin.

6. A lock comprising inner and outer escutcheon plate means, inner and outer knob means rotatably mounted in said escutcheon plate means, bolt means, ya bol-t casing slidably supporting said bolt means for movement betiween cxtreme positions, spring means mounted in said bolt casing to b-ias said bolt means to one of said extreme positions, cam means mounted in sa-id bol-t casing `to actuate said bolt means to the other of said extreme positions against the bias of said spring means, shaft means connecting said cam means and each of said knob means whereby rotational movement of either of said knob means causes actuation of said bolt means to said other extreme position through said cam means, bolt locking means provided in said bolt casing and being operable to lock said bolt against movement from said one extreme position to said other extreme position, inner lock actuating means connected between said inner door knob means and said bolt locking means for actuating said bolt locking means on rotational movement of said inner knob means to a preselected position, a key operated |lock cylinder means mounted in said outer knob means, andan outer lock actuating means connected between said key operated lock cylinder means and said :bolt locking means for actuating said bolt locking means actuable on movement of said key operated lock cylinder means.

7. The lock as defined -in claim 6 and with said inner and outer escutcheon plate means comprising a substantially flat plate portion, an inner cylindrical sleeve connected to the inner surface of said plate portion and extending inwardly therefrom at substantially right angles, said cylindrical sleeve having an outer diameter substantially equal to the diameter of a lock mounting bore provided in the door to which the lock is to be attached, a peripheral flange Iformed on said plate portion and extending inwardly therefrom, fastening means operably connected between said inner and outer escutcheon plate means and being accessible through said inner escutcheon plate only to axially displace said inner `and outer escutcheon plates toward and away fromv one another, and said cylindricl sleeve extending inwardly a greater distance than said, peripheral flange whereby said inner and outer escutcheon plates are movabletoward one another by actuation of said fastening means to locatesaid cylindrical sleevesthereot in said lock mountingb-ore in said door and to frictionally engage said peripheral iiangesof said inner and outer escutcheon plate means with the -inner and outer surfaces of the door surrounding said lock mounting bore.

8. Thelock as defined in claim 7 with said fastening means comprising bolt engaging means and bol-t receiving means, said bolt means and said bolt receiving means being located within the confines of said cylindrical sleeves and adapted to extend through said lock mounting bore in said door.

9. The lock as defined in claim 6 and wherein said inner knob means has a shape capable of indicating the rotative position of said knob means whereby the operativeness or inoperativeness of the bolt locking means may be determined by visual inspection.

10. The lock as defined in claim 6 and wherein said bolt means is of a bifurcated construction having la pair of parallelextending leg portions each having an inwardly extending projection therein and each terminating in an enlarged section defining pairs of shoulders, a spring stop member fixed to said casing Aand extending between said leg portions, said spring means being mountedbetween said spring stop member and said bolt means, said pro jections on said leg portions being adapted to engage said spring stop member and provide a stop limitingy outward displacement of said bolt means from within ,said casing, and said cam means being `mounted between said leg portions and engageable with said shoulders to slide said bolt rearwardly within said casing.

11. The lock as defined in claim 6 and with said'bolt casing comprisingan end plate having a bolt `receiving opening, a pair of shells defining a bolt receiving vbore having a cross-section corresponding -to the cross-sectional configuration of said bolt means, one yof said shells being permanently secured to said end plate andthe other. of said shells being removably mounted relative to said end plate and said one of said shells to facilitate assembly, of the lock components therewithin, and means provided within and between said shell portions to receive and retain said bolt means, said camvrneans, said spring means and said bolt locking means.

i2. The lock. as defined in claim 6 andrwith said cam means co-mprising a pair of cam members rotatably mounted between said bolt casing and` said bolt means, a pair of bearing bosses formed on said bolt casing on opposite sides theerof and defining coaxial bores, boss means provided on each of said cam members and being adapted to, berotatably supported in said pair of bear-ing bosses, 'shaft connecting means formed in said boss means to receive said shaft means,and bolt engaging portions of said cam lmembers being engageable with said bolt means to cause axial displacement thereof.

13. The ylock as defined in claim 6 with said shaft means comprisingseparate shaft members for each knob means, ,and with said oammeans comprising separate cam members, each 4olf saidshaft members extending into said bolt lof said separate cam members for actuating said b olt means by either said inner knob or said outer knob, one of said shaft members `for said inner knobmeans being additionally engageable with said bolt locking means to lock and unlock said bolt means by rotation of said inner knob means, said bolt locking means being operable to lock said bolt means in one rotative position of said inner knob means, and said key operated lock cylinder means being connected 4to said bolt locking means to release said bolt locking means and rotate said inner knob means from said preselected position.

14. 'I'he lock asdefined in claim 6 with said bolt locking means comprising a pair of lock lever arms rotatably supported `within said casing efor movement between abolt means blocking position and 4a release position, said lever arms being mounted for, opposite rotation, lock rcam means rotatably mounted between said lever arms and being engageable withsaid lever, arms for actuation thereof between said positions, and said lock cam means being operatively connected to said shaft means associated with said inner knob means formovement to and from said blocking position during rotation thereof and to said key acturatedlock cylinder means associated with said outer knob means to release said bolt locking means by rotation thereof.

l5. The lock of claim 14 in which said bolt means has Y surface portions inclined with respect to the direction of movement of said bolt means, said lever armshaving surface portions engageable with said inclined surface portions with said lever arms in said blocking position whereby a rearward force in said bolt means causes a force on said lever arms urging said lever arms toward said release position.

16. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, locking `lever arm meansvselectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having` locking cammeans for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member` to a first position and having moving cam means engageableA with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member` beyond said rst position, first means including a manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement of said movable member.

17. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having locking cam means for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to -a first position and having moving cam means engageable with said bolt member for moving said bolt membery to said unlatched position on movement of said combination cam member beyond said first position, said moving cam means being engageable with said bolt member on movement of said combination cam member a preselected distance beyond said first position at which. said locking cam means is ina position no longer maintaining said locking lever arm means in said blocking position, first means including a manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement of said movable member.

18. A door lock mechanism comprising a bolt member movable between -a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to anunlatched position, a combination cam member being 1/7 movable and having locking cam means for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a first position and having cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, rst means including a manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement of said movable member, an outer cam member having different cam means engageable with said bolt member for moving sa-id bolt member to said unlatched position on movement of said outer cam member, second means including a second manually movable member operatively associated with said outer cam member for moving said outer f comprising a pair of arms pivotably mounted for movement to and from said blocking position, a combination cam member being movable and having locking cam means for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a irst position and having vcam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said iirst position, said locking cam means comprising a generally elliptically-shaped cam member mounted for rotation between said pair of arms and having surfaces along a major axis engageable with said arms for moving said arms into said blocking position, first means including a manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement of said movable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said outer cam member, second means including a second manually movable member operatively associated with said outer cam member for moving said outer cam member upon movement of said second manually movable member.

20. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having locking cam means for moving and mainta-ining said locking lever arm means in said blocking position on movement of said combination cam member to a iirst position and having cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, rst means including a manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement of said movable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched posit-ion on movement of said outer cam member, second means including a second manually movable member operatively associated with said outer cam member for moving said outer cam member upon movement of said second manually movable member, and key actuated lock means operatively associated with said second means and being operatively connected to said combination cam member and being selectively actuable for moving said combination cam member into and out of said first position.

21. A door lock mechanism comprising an inner door knob assembly, an outer door knob assembly, a bolt member movable between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having locking cam means `for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a first position and having cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, said inner door knob assembly having an inner door knob member and means operatively associated with said combination cam member and said inner door knob member for moving said combination cam member on rotation of said inner door knob member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said cam member, said outer door knob assembly having an outer door knob member and means operatively associated with said outer cam member and said outer door knob member for moving said outer cam member on rotation of said outer door knob member, spring lock means operatively connected to said inner door knob member for resiliently holding said inner door knob member in that position locating said combination cam member in said first posit-ion.

22. A door lock mechanism comprising an inner door knob assembly, an outer door knob assembly, a bolt member movable between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to art unlatched p-osition,V a combination cam member being movable and having locking cam means for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a first position and having cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, said inner door knob assembly having an inner door knob member and means operatively associated with said combination cam member and said inner door knob member for moving said combination cam member responsively to rotation of said inner door knob member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said outer cam member, said outer door knob assembly having an outer door knob member and means operatively associated with said outer cam member and said outer door knob member for moving said outer cam member responsively to rotation of said outer door knob member, said means operatively associated with said combination cam member and said inner door knob member including an inner actuating shaft connected to said inner door knob member for rotation therewith and being Areceivable into keyed engagement with said combination cam member, said means operatively associated with said outer cam member and said outer door knob member including an outer actuating shaftconnected to said outer door knob member for rotation therewith and being receivable into keyed engagement with said outer cam member, said outer door knob assembly including key actuated lock means being operatively connected to said combination cam member and being selectively actuable for moving said combination cam member into and out of said first position.

23. A door lock mechanism comprising a bolt member mov-able between a latching and unlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable andk having locking cam means for moving and 'maintaining said locking lever arm means in said blocking j position on movement of said combination cam member to a first position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said combinati-on c-am member beyond said first position, tirst means including a rst'manually movable member operatively l associated with said combination cam member for movying said combination cam member upon movement of said irst movable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said outer cam member, second means including a second manually movable member operatively `associated with said outer cam member for moving said outer cam member upon movement of said second manually movable member, lock arm means engageable with said combination cam member and selectively operable for moving said combination cam member into and out of said irst position, and key actuated lock means operatively associated with said second means and being operatively t connected to said lock arm means for operating said lock arm means by means of a key member.

` 24. A door lock mechanism comprising a bolt memberV movable between a latching and unlatching position, locking lever arm'means selectively movable to a blocking position for'blocking movement of said bolt member to an unlatched position, a combination cam member being mov-able and having `locking cam means for moving and v maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a rst position and having moving cam means engageable With said bolt member for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, first means including a lirst manually movable member operatively associated with said combination cam member for moving said combination cam member upon movement v'of said irst movable member, an outer cam member having'tdifferent cam means engageable with said bolt member for moving said bolt member to said unlatched position on movement of said outer cam member, second y means including a second manually movable member tively movable in one direction for moving said combination cam member into said rst position and in a second direction for moving said combination cam member out of said rst posi-tion, means operatively associated with said lock arm means for preventing movement of said llock arm means in said one direction beyond a position at which said combination cam member is in said rst position, and key actuated lock means operatively associated with said second means and being operatively con- A nected to said lock arm means for operating said lock arm means by means of a key member.

25. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, a

locking lever arm selectively movable to ,a blocking position in engagement with said bolt member for blocking said bolt member from movement to an unlatched posit tion, a combination cam member being rotatable and having locking cam means for moving and maintaining said locking lever arm into said blocking position on rotation of said combination cam member to a irst position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched posip tion on rotation of said combination cam member beyond said first position, rst means including a tirst manually v rotatable member operatively associated with said combination cam member for rotating said combination cam "member upon rotation of said first rotatable member, an

outer cam member having different cam means engageable with said bolt member for moving ysaid bolt member to 'said unlatched position on rotation of said outer cam member, lock arm means ,engageable with said combination cam member and selectively rotatable in one direction for rotating said combination cam member into said tirst position and in a second direction for rotating said combination cam member out of said irst position, means locating said locking lever arm vin a position blocking said lock arm means from rotation in said one direction beyond a position at which said combination cammentber is in said iirst position, and key actuated lock means operatively associated with said second means and `being operatively connected to said lock arm means for operating said lock arm means by means of a key member.

26. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, a locking lever arm selectively movable to a blocking position in engagement with said bolt member for blocking said bolt member from movement to an unlatched position, a combination cam member being rotatable and having locking cam means for moving and maintaining Saud locking lever arm into said blocking position on rotation of said combination cam member to a first position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of` said combination cam member beyond said first position, first means inclu-ding a lirst manually rotatable member operatively associated with said combination cam member for rotating said combination cam member upon rotation of said iirst rotatable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said outer cam member, second means including a second manually rotatable member operatively associated with said outer cam member for mov-ing said outer cam member upon rotation of said second manually rotatable member, lock arm means engageable with said combination cam member and selectively rotatable in one direction for rotating said combination cam member into said first position and in a second direction for rotating said combination cam member out of said first position, means locating said locking lever -arm in a position block-ing said lock arm means from rotation in said one direction beyond a position at which said combination cam member is in said irst position, and key actuated lock means operatively associated with said second means and being operatively connected to said lock larm means for operating said lock arm means by means of a key member, said combination cam member including support means for rotatably supporting said lock arm means for relative rotation ccaxially with s-aid combination cam member.

27. A door lock mechanism comprising a bolt member movable between a latching and unlatching position, a locking lever arm selectively movable to a blocking position in engagement with said bolt member for blocking said bolt member from movement to an unlatched position, a combination cam member being rotatable and having locking cam means for moving and maintaining said locking lever arm into said blocking position on rotation of said combination cam member to a first position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said combination cam member beyond said iirstk position, said moving cam means including av pair of shoulders selectively engageable for rotating said combination cam member, irst means including a `first manually rotatable member oper- -atively connected with said combination cam member for rotating said combination cam member substantially simultaneously with rotation of said iirst rotatable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said outer cam member, second means including a second manually rotatable member operatively associated with said outer cam member for moving said outer cam member upon rotation of said second manu-ally rotatable member, lock arm means engageable with said shoulders on said moving cam means and selectively rotatable in one direction for engaging one of said shoulders for rotating said -combination cam member into said -first position and in a Isecond direction for engaging the other of said shoulders for rotating said combination cam member out of said first position, means locating said locking lever arm in a position blocking said lock arm means from'rotation in said one direction beyond a position at which said combination cam member is in said first position, and key actuated lock means operatively associated with said second means and being operatively connected to said lock arm means for operating said lock arm means by means of a key member, said combination cam member including support means for rotatably supporting -said lock arm means for relative rotation coaxially with said combination cam member, said lock arm means comprising a tubular portion mounted on said support means and an arm portion having a tab extending towards said moving cam means and terminating at a loc-ation at which said tab is selectively engageable with said shoulders on said moving cam means.

28. A door lock mechanism comprising a bolt memberhaving a bifurcatedk portion deiined by a pair of parallelly extendnig legs and being movable between a latching and unlatching position, a pair of locking lever arms located at ya position between said legs and each movable to blocking positions in engagement with one of said legs of said bolt member for blocking said bolt member from movement to an unlatched position, a combination cam member being rotatable and having locking cam means for moving and .maintaining said locking lever arms into said blocking positions on rotation of said combination cam member to a first position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said combination cam member beyond said Kfirst position, said moving cam means including a pair of shoulders selectively engageable for rotating said combination cam member, first means including a first manualy rotatable member operatively connected with said combination cam member for rotating said combination cam member substantially simultaneously with rotation of said iirst rotatable member, an outer cam member having different cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said outer cam member, second means including a second manually rotatable member operatively associated with said outer cam member for moving said outer cam member upon rotation of said second manually rotatable member, lock arm means engageable with said shoulders on said moving cam means and selectively rotatable in one direction for engaging one of said shoulders for rotating said combination cam member into said first position and in a second direction for engaging the other of said shoulders rotating said combination cam member out of said first position, means locating one of said locking lever arms in a position blocking said one of said shoulders from said lock arm means with said combination cam member in said first position and locating the other of said locking lever arms in a position blocking said other of said shoulders -from said lock arm means with said combination cam Imember at a selected different position, and key actuated lock means operatively associated with said sec-ond means and being operatively connected to said lock arm means for operating said lock arm means by means of a key member.

29. A door lock mechanism comprising a bolt member having a bifurcated portion defined by a pair olf parallelly extending -legs and being movable between a latching and unlatching position, a pair orf locking lever arms located at a position betwen said legs and each movable to blocking positions in engagement with one of s-aid legs of said bolt member 'for blocking said bolt member tfrom movement to an unlatched position, a combination cam member beinlg rotatable and having locking cam means ttor moving and maintain-ing said locking lever arms into said blocking positions on 'rotation of said combination cam member to .a first position and having moving cam means engageable with said bolt member for moving said bolt member to said unlatched position on rotation of said combination cam member beyond said first position, said moving cam mean-s including a pair `of shoulders selectively engageable [for rotating said combination cam member, first means including a first manually rotatable member operatively connected with said combination cam member for rotating said combination cam member substantially simultaneously with rotation of said first rotatable member, an outer cam member having different cam means engageable with 'said bolt member for moving said bolt member to said unlatched position on rotation of said outer Acam member, second means including a second manually rotatable member operatively asociated with said outer cam member for moving sai-d outer cam member upon rotation of said second manu-ally rotatable member, lock arm means engageable with said shoulders on said moving cam means and selectively rotatable in one direction for engaging one of said shoulders for rotating said combination cam member into said first position and in a `second direction for engaging the other of said shoulders rotating said combination cam member out of s-aid first position, means locating one of said locking lever arms in a position blocking said one of said shoulders from -lofck arm means with said combination cam member in said lirst position and locating the other of said locking lever arms in a position blocking said other of said shoulders from `said lock arm means with said combination cam member at a selected different position, and key actuated lock means operatively associated Iwith said second means and being operatively connected to said lock arm means for operating said lock arm means by means of a key member, said combination cam member including support means for rotatably supporting said lock arm means tfor relative rotation coaxially with said combination cam member, said lock Iarm means comprising a tubular portion mounted on said support means `and an arm portion having a tab extending towards said moving cam means and terminating at a location at which said tab is selectively engageable with said shoulders 0n said moving cam means.

30. A door lock mechanism comprising a bolt member movable between a latching and nnlatching position, locking lever arm means selectively movable to a blocking position for blocking movement of said bolt member to an unlatched position, a combination cam member being movable and having locking cam -means for moving and maintaining said locking lever arm means in said blocking position on movement of said combination cam member to a first position land having moving cam means engageaible with said bolt member `for moving said bolt member to said unlatched position on movement of said combination cam member beyond said first position, rst means including ra first manually movable member operatively associated with said comlbination cam member for moving said combination cam member upon movement of sa-id first mov-able member, an outer ycam member having different cam means engageable with said bolt member .for moving sa-id bolt member to said unlatched position on movement of said outer cam member, second 2B means including a second manually movable member operatively ass-ociated with said outer cam member [for moving said outer cam member upon movement of said second manually movable member, look anni means engage-able with lsaid combination cam member and selective-ly operable for moving said combination cam member into and out of said iirst position, key actuated lockmeans operatively associated with said second lmeans and being operativelyr connected -to said lock arm means for operating said lock `arm means by means of a key member, and resilient lockingv means-operatively associated with said combination cam member for resiliently locking said combination cam member in said irst position.

31. A door lock mechanism :comprising la housing assembly, a bolt membersnpported in said housing for movement between a latching `and unlatching position, a

locking lever anni pivotally mounted in said housing vas-A sembly and selectively movable 'to a blocking position in engagement with said bolt member for blocking saidy bolt member from movement to an unlatched position, a combination vcam member rotatably supported on said housing and having locking cam means for moving and maintaining said locking lever `arm into said blocking position on rotation oi said combination cam member to a iirst posiv tion and having movin-g cam means engageable with said bolt member vfor moving said bolt member vto said unlat-ched position on rotation of said `combination cam member beyond said first position, rst means including a rst manually rotatable member operatively associated with said combination cam member for rotating said combinat-ion cam member upon rotation of said rst rotatable member, an outer cam member rotatably supported on said housing and having `different cam means engageable with said bolt member for moving said bolt member to said unlatched position on lrotation of said outer cam member, second means including a second manually rotatable member operatively associated With said outer cam member for moving said outer cam member upon rotaincluding a bal-l member and a spring member resiliently urging said ball ymember into engagement vvith said combination cam member, said combination cam member having a depression for receiving said ball member when said combination cam member is `in said rst position where-by said combination cani member resiliently holds said. combination cam member in said rst position.

32. The mechanism of claim 31 iny which said housing assembly is of a relatively soft material and has an open slot for holding said ball and spring assembly and further including a cover member of a hard material relative to said soft material and having a plurality of teeth and bein-g located over said open `slot Wt-h said `teeth engaging said soft material for retaining said lball and yspring members References Cited by the Examiner,

UNITED STATES PATENTS 1,446,085 2/1923 Falk 70-150 1,544,319 6/1925 Hoffman 70-150 2,272,909 2/1942 Fantl 292-153 2,631,878 3/ 1953 Backhouse 292-169 2,651,934 9/1953 Chesler 70-150 X 2,803,957 8/1957 Geonge 70-150 X ALBERT H. KAMPE, Primary Examiner` BOBBY R. GAY, Examiner. 

1. A DOOR LOCK MECHANISM COMPRISING AN INNER DOOR KNOB ASSEMBLY, AN OUTER DOOR KNOB ASSEMBLY, A BOLT MEMBER MOVABLE BETWEEN A LATCHING AND UNLATCHING POSITION, LOCKING LEVER ARM MEANS SELECTIVELY MOVABLE TO A BLOCKING POSITION FOR BLOCKING MOVEMENT OF SAID BOLT MEMBER TO AN UNLATCHED POSITION, A COMBINATION CAM MEMBER BEING MOVABLE AND HAVING LOCKING CAM MEANS FOR MOVING AND MAINTAINING SAID LOCKING LEVER ARM MEANS IN SAID BLOCKING POSITION RESPONSIVELY TO MOVEMENT OF SAID COMBINATION CAM MEMBER TO A FIRST POSITION AND HAVING CAM MEANS ENGAGEABLE WITH SAID BOLT MEMBER FOR MOVING SAID BOLT MEMBER TO SAID UNLATCHED POSITION ON MOVEMENT OF SAID COMBINATION CAM MEMBER BEYOND SAID FIRST POSITION, SAID INNER DOOR KNOB ASSEMBLY HAVING AN INNER DOOR KNOB MEMBER AND MEANS OPERATIVELY ASSOCIATED WITH SAID COMBINATION CAM MEMBER AND SAID INNER DOR KNOB MEMBER FOR MOVING SAID COMBINATION CAM MEMBER RESPONSIVELY TO ROTATION OF SAID INNER DOOR KNOB MEMBER, AN OUTER CAM MEMBER HAVING DIFFERENT CAM MEANS ENGAGEABLE WITH SAID BOLT MEMBER FOR MOVING SAID BOLT MEMBER TO SAID UNLATCHED POSITION ON MOVEMENT OF SAID OUTER CAM MEMBER, SAID OUTER DOOR KNOB ASSEMBLY HAVING AN OUTER DOOR KNOB MEMBER AND MEANS OPERATIVELY ASSOCIATED WITH SAID OUTER CAM MEMBER AND SAID OUTER DOOR KNOB MEMBER FOR MOVING SAID OUTER CAM MEMBER RESPONSIVELY TO ROTATION OF SAID OUTER DOOR KNOB MEMBER. 